1. Calculate the probability that in 100 rolls of a fair die, a "1" appears between 10 to 20 times, inclusive.

(Hint: use 9.5 and 20.5 as the boundary)

1. A bird watching club has determined that 23% of the owls spotted in a year are great horned owls, with a margin of error of +/- 1.3%, 19 times out of 20. Which of these percents for sightings of the great horned owl would not be possible in the observations for the following year?

A. 19% B. 21% C. 24% D. All are possible